Product Review · Air Purifiers · #3 Ranked
Blueair 311i Max
Air purifiers — medium-room smart HEPASilent, ultra-quiet · Reviewed by Katie · amazon.com live, Sept 9 2026
Why it scored a 82
At $229.00 the Blueair 311i Max is a medium-room smart purifier favored by Consumer Reports and TechGearLab. Satisfaction leads at 90 and Reliability at 88, with Value at 84 on 314 CFM of dust CADR, a 7.3-pound body, and roughly $60 a year in filters. Quality sits at 74 because HEPASilent is not true HEPA and carries an always-on low-ozone ionizer, the carbon load is small for odors, and the child lock is easily bypassed; the 1-year base warranty, 3 with registration, keeps Warranty at 78. It is for a bedroom or living area where a whisper-quiet, app-connected unit matters more than odor control.
What you're getting
- CADR 365 pollen / 314 dust / 283 smoke CFM
- 444-465 sq ft recommended room; 2,107 sq ft/hr at 1 ACH
- 23-50 dB official (TechGearLab measured 28.6 / 40 / 47.9 dB)
- Particle & Carbon filter ~$37.50-52.50 every 9 months (~$60/yr)
- Washable fabric pre-filter; 7.3 lb; ~19 x 11 x 11 in; ~38 W max
- PM2.5 sensor auto mode, night mode, child lock (easily bypassed)
- Wi-Fi + Blueair app, Alexa/Google, RealTrack filter tracking, geofencing
- HEPASilent with always-on low-ozone ionizer, not true HEPA; 1-yr warranty (3 registered)
ViperScore breakdown
At a glance
- CADR 365 pollen / 314 dust / 283 smoke CFM
- 444–465 sq ft room; 23–50 dB; 7.3 lb
- Filter ~$60/yr every 9 months; 1-yr warranty (3 registered)
- Price$229.00
- TierAir purifiers — medium-room smart HEPASilent, ultra-quiet
- Category rank#3 of 10
